Verified Answer :

3(2x+4y-2z)+7(x+y-4z) =
32x + 34y - 32z + 7x + 7y - 74z =
6x + 12y - 6z + 7x + 7y - 28z =
(6+7)x + (12+7)y + (-6-28)z =
13x + 19y + (-34)z =
13x + 19y -34z;

ssantiago73

Answer:

13x + 19y - 34z is correct.

Step-by-step explanation:

Distribute to get 6x + 12y - 6z + 7x + 7y - 28z, which combines to the answer.

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